View difference between Paste ID: <a href="/b6d3ZUW2">b6d3ZUW2</a> and <a href="/RvTjchxv">RvTjchxv</a>

/*
1		/*
2		* File: NESRGBSwitch.c
3		* Author: Ben Whitman
4		*
5		* PIC10F322
6		*
7		* Created on April 2, 2015, 6:33 PM
8		*/
9
10		#include <stdio.h>
11		#include <stdlib.h>
12		#include <stdint.h>
13		#include <xc.h>
14
15		#include "HEFlash.h"
16
17		// CONFIG
18		#pragma config FOSC = INTOSC // Oscillator Selection bits (INTOSC oscillator: CLKIN function disabled)
19		#pragma config BOREN = ON // Brown-out Reset Enable (Brown-out Reset enabled)
20		#pragma config WDTE = OFF // Watchdog Timer Enable (WDT disabled)
21		#pragma config PWRTE = ON // Power-up Timer Enable bit (PWRT enabled)
22		#pragma config MCLRE = OFF // MCLR Pin Function Select bit (MCLR pin function is digital input, MCLR internally tied to VDD)
23		#pragma config CP = OFF // Code Protection bit (Program memory code protection is disabled)
24		#pragma config LVP = OFF // Low-Voltage Programming Enable (High-voltage on MCLR/VPP must be used for programming)
25		#pragma config LPBOR = ON // Brown-out Reset Selection bits (BOR enabled)
26		#pragma config BORV = LO // Brown-out Reset Voltage Selection (Brown-out Reset Voltage (Vbor), low trip point selected.)
27		#pragma config WRT = OFF // Flash Memory Self-Write Protection (Write protection off)
28
29
30		uint8_t input_state = 1;
31		uint8_t output_state = 0;
32		uint8_t shift_reg = 0xFF;
33
34		void button_pressed();
35		void button_released();
36		void switch_output();
37		void save_selection();
38
39		/*
40		*
41		*/
42		int main(int argc, char** argv) {
43
44		OSCCON = 0x00;
45		INTCON = 0x00;
46
47		OPTION_REGbits.nWPUEN = 0;
48		OPTION_REGbits.T0CS = 0;
49		OPTION_REGbits.PSA = 0;
50		OPTION_REGbits.PS0 = 1;
51		OPTION_REGbits.PS1 = 1;
52		OPTION_REGbits.PS2 = 1;
53
54		TRISA = 0x0F;
55		LATA = 0x00;
56		WPUA = 0x08;
57		ANSELA = 0x00;
58
59		INTCONbits.TMR0IF = 0;
60		INTCONbits.TMR0IE = 0;
61		INTCONbits.GIE = 0;
62
63		HEFLASH_readBlock (&output_state, (HEFLASH_MAXROWS - 1), 1);
64
65		while(1)
66		{
67		shift_reg = (shift_reg << 1) \| PORTAbits.RA3;
68
69		switch(input_state)
70		{
71		case 0:
72		if(shift_reg == 0xFF)
73		{
74		input_state = 1;
75		button_released();
76		}
77		break;
78
79		case 1:
80		if(shift_reg == 0x00)
81		{
82		input_state = 0;
83		button_pressed();
84		}
85		break;
86
87		default:
88		input_state = PORTAbits.RA3;
89		}
90
91		switch(output_state)
92		{
93		case 0: // Natural palette: 011
94		TRISA = 0x0B;
95		break;
96
97		case 1: // Improved palette: 101 \| 001
98		TRISA = 0x0D;
99		break;
100
101		case 2: // Garish palette: 110 \| 010
102		TRISA = 0x0E;
103		break;
104
105		case 3: // Composite out
106		TRISA = 0x0F;
107		break;
108
109		default: // Natural palette
110		TRISA = 0x0B;
111		}
112		}
113
114		return (EXIT_SUCCESS);
115		}
116
117		void button_pressed()
118		{
119		TMR0IF = 0;
120		TMR0 = 239;
121		}
122
123
124		void button_released()
125		{
126		if(TMR0IF) // Long press
127		{
128		save_selection();
129		}
130
131		else // Short press
132		{
133		switch_output();
134		}
135		}
136
137
138		void switch_output()
139		{
140		if(output_state++ > 2) // State 3 = NESRGB disabled/PPU component out
141		{
142		output_state = 0;
143		}
144		}
145
146
147		void save_selection()
148		{
149		char ret = HEFLASH_writeBlock ((HEFLASH_MAXROWS - 1), &output_state, 1);
150		}